Well, it was put there as a whack-a-mole prevention aid because there was a spate of "You're going to laugh at this...!" threads featuring that picture, which got rather tiresome.
Maybe it's served its purpose and it'd be an idea to remove it; however, I'm sure it wouldn't be long before someone re-discovers that very same never-seen-before picture for our collective joyousness...
(My guess is 3 weeks, or less if someone does it as a wind-up.)